HT46R064G/065G/0662G
Enhanced A/D Type 8-Bit OTP MCU with OPA
Interrupts
Interrupts are an important part of any microcontroller system. When an external event or an internal
function such as a Timer/Event Counter or Time Base requires microcontroller attention, their
corresponding interrupt will enforce a temporary suspension of the main program allowing the
microcontroller to direct attention to their respective needs.
The devices contain a single external interrupt and multiple internal interrupts. The external interrupt
is controlled by the action of the external interrupt pin, while the internal interrupts are controlled by
the various functions such as Timer/Event Counters and Time Base overflow, etc.
Interrupt Register
Overall interrupt control, which means interrupt enabling and request flag setting, is controlled by
using the registers, INTC0 and INTC1. By controlling the appropriate enable bits in the registers each
individual interrupt can be enabled or disabled. Also when an interrupt occurs, the corresponding
request flag will be set by the microcontroller. The global enable control bit if cleared to zero will
disable all interrupts.
INTC0 Register - HT46R064G
Bit
Name
R/W
7
6
5
4
3
2
1
INTE
R/W
0
0
T0F
R/W
0
INTF
R/W
0
T0E
R/W
0
EMI
R/W
0
¾
¾
¾
¾
¾
¾
¾
¾
¾
POR
Bit 7~6
Bit 5
unimplemented, read as ²0²
T0F: Timer/Event Counter 0 interrupt request flag
0: inactive
1: active
Bit 4
INTF: External interrupt request flag
0: inactive
1: active
Bit 3
Bit 2
unimplemented, read as ²0²
T0E: Timer/Event Counter 0 interrupt enable
0: disable
1: enable
Bit 1
Bit 0
INTE: external interrupt enable
0: disable
1: enable
EMI: Master interrupt global enable
0: disable
1: enable
Rev. 1.00
91
March 3, 2011
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
